HP 9800 SERIES

9845B/C Mainframe Diagrams 9-9
Memory Section
The read/write memory and read-only memory assemblies that make up the memory section
are:
A46 09845-66546 (Opt. 2XX)
,A,28 09845-66528 (Opt. 1 XX)
LPU RAM/ROM
Assembly (LRR)
64k bytes
of RAM
64k bytes
of ROM
A26 09845-66526
A44 09845-66544
PPU
A27 09845-66527
PPU
RAM/ROM
Assembly (PRR)
32K-'Bytes of RAM
64K-Bytes of ROM
PPU ROM
Drawer --- ..... ___ ~
A42 09845-66542
+--H---LPU ROM Drawer
PC Assembly
PC Assembly
Bit Position
Address
High
I
High
B~GG GGGGG8GBBB~
DDDDDDDDDDDDDDDD
~~DDDDDDDDDDDDDDDD
~~GGGGGGGGGG8B888B
Block
64K Bytes Low
Address
Low I
Block
64K Bytes
Jumper Positions:
Blk4,6
Blk 10,12
Blk 14,16
...... _______________ ....J Not Used
A26 Assembly
I